A direct Measurement of the W Boson Width in ppbar Collisions at sqrt(s) = 1.96 TeV
Abstract
A direct measurement of the total decay width of the W boson GW is presented using 350 pb-1 of data from ppbar collisions at sqrt(s) = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. The width is determined by normalizing predicted signal and background distributions to 230185 W candidates decaying to enu and munu in the transverse-mass region 50 < MT < 90 GeV and then fitting the predicted shape to 6055 events in the high-MT region, 90 < MT < 200 GeV. The result is GW = 2032 +/- 45 (stat.) +/- 57 (syst.) MeV, consistent with the standard model expectation.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.